Submission #172359

#	Time	Username	Problem	Language	Result	Execution time	Memory
172359		Lightning	Longest beautiful sequence (IZhO17_subsequence)	C++14	23 / 100	140 ms	2044 KiB

subsequence

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <stack>
#include <queue>
#include <deque>

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;

#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define show(a) cerr << #a <<" -> "<< a <<"\n"
#define fo(a, b, c, d) for(int (a) = (b); (a) <= (c); (a) += (d))
#define foo(a, b, c ,d) for(int (a) = (b); (a) >= (c); (a) -= (d))
//#define int ll

const int N = 2e5 + 5;
const int INF = 1e9 + 5;

int n, a[N], k[N], dp[N], p[N], posans, pos[N];

int main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	for(int i = 1; i <= n; ++i) {
		cin >> k[i];
	}
	int ans = 0, posans = 0;
	for(int i = 1; i <= n; ++i) {
		int mx = 0;
		if(n <= 5000) {
    		for(int j = 1; j < i; ++j) {
    			if(__builtin_popcount((a[i] & a[j])) == k[i]) {
    				if(mx < dp[j]) {
    					mx = dp[j];
    					p[i] = j;
    				}
    			}
    		} 
		} else {
			for(int j = 0; j < (1 << 8); ++j) {
				if(pos[j] != 0 && __builtin_popcount((a[i] & j)) == k[i]) {
    				if(mx < dp[pos[j]]) {
    					mx = dp[pos[j]];
    					p[i] = pos[j];
    				}
    			}
			}
			pos[a[i]] = i;		
		}
		dp[i] = mx + 1;
    	if(ans < dp[i]) {
    		ans = dp[i];
    		posans = i;
    	}
	}
	vector <int> vec;
	while(posans) {vec.pb(posans); posans = p[posans];}
	reverse(all(vec));
	cout << ans <<'\n';
	for(int it : vec)
		cout << it <<' ';
	return 0;
}
/*
4
1 2 3 4
10 0 1 0

5
5 3 5 3 5
10 1 20 1 20
*/
/*
-------------------------------------------------------------------------------------------
	If you only do what you can do, 
	You will never be more than you are now!
-------------------------------------------------------------------------------------------
	We must all suffer from one of two pains: the pain of discipline or the pain of regret. 
	The difference is discipline weighs grams while regret weighs tons.
-------------------------------------------------------------------------------------------
*/

• Subtask 1: 7 / 7
• Subtask 2: 16 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60